如何从python 2.6

Question

我已经在python 2.7中编写了一个代码，但我不确定如何在python 2.6中编写它，bcz在2.6上运行时会出现一些错误

a = {0:1234}
b = {0:1500}
c = {key: b[key] - a.get(key, 0) for key in a.keys()}
d = {x:y for x,y in c.items() if y!=0}
print d

错误

  

./ run.py -e dev -s atlas File＆＃34; ./ run.py" ;,第59行       Lz_ofstes_subtract = {key：lz_offset_2 [key] - lz_offset_1.get（key，0）表示lz_offset_1.keys（）中的键                                                                               ^ SyntaxError：语法无效